Finding the Fourth Proportional to 8,581.10, 12,863.39 and 3,312.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,581.10 : 12,863.39 = 3,312.23 : x
2. Step 2: Convert to fraction form
   8,581.10/12,863.39 = 3,312.23/x
3. Step 3: Cross multiply
   8,581.10x = 12,863.39 × 3,312.23
4. Step 4: Simplify right side
   8,581.10x = 42,606,425.38
5. Step 5: Solve for x
   x = 42,606,425.38/8,581.10
6. Step 6: Final answer
   x = 4,965.15